Appendix – INFICON SKY CDGxxxD (DeviceNet) User Manual
Page 31
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tira51e1 (2009-01) CDGxxxD.cp
31
Appendix
AA BB CC DD
h
(4-Byte, floating format)
Legend: XX
h
Hexadecimal
number
(Radix = 16)
XX
d
Decimal number (Radix = 10)
XX
b
Binary number (Radix = 2)
DD
h
CC
h
BB
h
AA
h
S E E E E E E E
b
E M M M
M M M M
b
M M M M M M M M
b
M M M M M M M M
b
S EEEE
EEEE
b
MMM MMMM MMMM MMMM MMMM MMMM
b
Ш
Ш
Ш
1+
MMM MMMM MMMM MMMM MMMM MMMMb
2
23
⎛
⎝
⎜
⎜
⎞
⎠
⎟
⎟
= 1+
NNNNN
d
d
8388608
⎛
⎝
⎜
⎞
⎠
⎟
Ø
Sign =
Exponent =
Mantissa =
-1
S
XYZ
d
RSTUV
d
Sign × 2
(Exponent-127)
× Mantissa
A: Conversion of a Floating
Number According to
IEEE 754
General
Number received
1. Reverse the sequence of
the HEX words
2. Separate into bytes
3. Calculate
Converted number
Sign
8-Bit exponent
23-Bit mantissa
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